Rotary fluid motor



Nov. l, 19348. v L BENDSlL ET AL 2,135,161

ROTARY FLUID MOTOR Filed NOV. 20, 1956 2 Sheets-Sheet 1VunLau/PeHceBendSl andlous Joseph StJohrL.V

BY @md/3m,

ATTORNEY.

Nov. l, 1938. v L. BENDSIL ET AL ROTARY FLUID MOTOR Filed Nov. 20, 19362 Sheets-Sheet 2 WJMMN T etfKR NBN@ n wmwT www@ Wm 1mm@J n @LB Vm aPatented Nov. 1, 193,8

UNITED STATES PATENT OFFICE John, Bellingham, Wash.

Application November 2o, 1936, serial No. 112,085

2 Claims.

An application for patent for our invention was led November 12, 1935,Serial No. 49,344, now abandoned, of which this application is acontinuation in part.

.5; Our invention relates to improvements in hydraulic rotary motors,and has for an object to provide an efficient and simple rotary fluidmotor suitable for general use.

Another object of our invention is to provide a m' rotary fluid motorsuitable for attachment to the driving Wheels of an automobile torevolve the same by fluid .forced to pass through the motor.

Other objects of our improvement will appear as the descriptionproceeds.

l. vWe attain these and other objects of our invention with themechanism illustrated in the two sheets of drawings accompanying andformshown in transverse, medial section, in placev thereon; Fig` 2 is across-section view of. the portion of Fig. on the line 2 2 thereof,drawn on the same scale as Fig. 1; Fig. 3 is a front elevation View ofour rotary motor partly in section on the bent line 3 3 of Fig. 1, drawnon a smaller scale; Fig. 4 is the developed cross-section of Fig. 3 onthe arc 4 4 thereof.; Fig. 5 is a front elevation view of the housing ofour rotary' oil motor, segregated and shown with its cover removed,drawn on a smaller scale; Fig. 6 is an elevation view of one of thesimilar motor-vane units, drawn on a larger scale; Fig. 7 is abottomplan view of Fig. 6; and Fig. 8 is a plan View of that part of Fig. 1cut by a plane through 3 8 thereof, drawn on a larger scale.

Similar characters refer to similar parts throughout. Certain parts arebroken away to show other parts hidden thereby.

In the following description numbers from 9 to 51, inclusive, are notused as designating characters. Y

With more particular reference to designating parts: The oil rotor shownin Fig. 1 is in place and fastened on the front wheel of an automobile,but it also is suitable for mounting on and attaching to the rearwheelof an automobile with only suchexternal changes as pertain to the50. means to fasten it tothe rear automobile axle.

A The rotor housing consists of the circular chamber structure 52,disposed next to the automobile frame, and the cover of the-housing nextto the automobile Wheel shown at 53. The

liliv housing 52 has the inlet arm 54and the outlet arm 55, projectinglaterally from the top of the housing, but when it is desired to operatethewheel backwards, the course of. oil through the rotor is reversed andenters through the arm 55 and leaves from the arm 54. The circular cham.f5:

ber Within the said housing is of equal radial depth throughout, exceptat the ports Where the oil enters vand leaves the chamber, and of equaltransverse width throughout except at the top where the Width of thechamber is reduced to 10' little more than the thickness of the Vanesand is gradually widened from this narrowest part by the cam surfaces58, 58 and59, 59.

As illustrated, there are eight rotor Varies each fastened on the outerend of a vane post 6l. lThe l5 eight rotor vanes and posts are exactly`similar but, for convenience of the description the vanes are givendiierent designating characters depending on their particular locationin the drawings. Rotor Vane 60 is at the upper end of the 20 chamberWhile rotor vane 69a is at the lower part thereof. The upper diagonalrotor vanes 60h and 60 are shown at theleft and right hand,respectively, of Fig. 3, while the rotor vanes 60d and 60e are shown atthe left and right hand 25 ends, respectively, of a horizontal diameterof the chamber. The lower diagonally disposed rotor varies are not shownin the illustrations.

There are eight vane post holes, radially disposed and equally spaced inthe transverse center 30.

of the periphery of the'rotor disc 61. The rotor disc El hask inner andouter hubs 68 and 68a, respectively, mounted for revolution in ballbearings 69, 69, one of which is disposed in the rotor housing 52 andthe other in the housing cover 53. 35

The vane post holes are all alike With the smallest diameter 54 atthebottom,'the medium diameter in the middle and the largest diameter 66 atthe top. Near the bottom of each post hole, in the smallest part 54, isthe sectoral en- 40 largement Bla.

Each of the similar vane posts has the cylindrical body 6l and thecircular boss top 62, at theinner edge of the vane, which fits into thelargest part 66 of the post hole. On the inner 45 end of each Vane postis the key 6Ia disposed in the sectoral enlargement 6l'EL of the posthole.' The latter is of the required sizebetween its ends B'l'b and 61C,relative to the thickness. of the key Gla, to limit the Yoscillations ofthe vane and post 50` to and is disposed to permit the Vane to occupypositions in the rotor chamber at right angles with the rotor axis Yoirevolution and also parallel With the same.

4 The housing cover 53 has the hollow hub 'Ill 53:

which mounts the hollow wheel hub 1I for revolution on roller bearings12. The wheel hub 1I has the wheel disc 18 fastened thereto, theperiphery of which is fastened on the wheel rim 19. The hub cover 11 isfastened to the hub 1| and has an inner central hub 16 in which isengaged the outer end 15 of the floating axle 13, the inner end 14 ofwhich is engaged in the hub 68, 68a of the rotor disc 61.

The individual-wheel-suspension bracket has upper and lower arms 8l and82, respectively, from which project inwardly-inclined, aligned pins 83and 84, respectively, to engage in the bearing holes 83a and 84a in therotor housing 52. IIhe bracket 80 is provided with upper and lower bolteyes and 85a respectively. The wheel 19 may oscillate on the said pins83 and 84.

The section on the diagonal line 2-2`of Fig. 5, shown in Fig. 2,illustrates the shape of the similar rotor-housing ports in the arms 54and 55, wherein a conduit, notv shown, connected with arm 54 has conduitconnection with the rotor chamber through the slot 54h, which isnarrower than the thickness of the rotor vanes in order to prevent theirentry or engagement therewith as they pass by the same. A` similarlydisposed cross-section of the port 55 also would show a narrow slotconduit connection similar to 54b between a conduit not shown butconnected with port arm 55 and the rotor chamber for a similar reason. p

The annular rotor chamber` in which the rotor vanes revolve on the axisof the rotor disc 61 and oscillate on the axes of their posts 6Iconsists of opposite annular areas of. the inner walls of the rotorhousing 52 and rotor-housing cover 53 and the opposite circular areas ofthe inner peripheral wall of the said housing and the peripheral wall orsurface of the said rotor disc. Through a-sector of more than one halfof this chamber the vanes are disposed transversely of the rotor discand the chamber as they pass through the chamber. During this part oftheir revolution on the axis of. the rotor'disc the springs 63 tend tomaintain them in the said transverse disposition. An helical spring 63is mounted on each of the vane posts 6I and has one end fastened to thepost and its other end fastened to the rotor disc 61 in a manner to tendto revolve lthe post in a clockwise direction on its axis as viewed fromits inner end. This urge of the spring 63 tends to maintain the postlkey Gla against the end or stop 61c of the sectoral enlargement 61a ofthe post hole and, the vane 60 transversely of the rotor chamber asstated above.

As seen in Figs. 3 and 4, when a vane reaches the port 55 at theleft-hand end of the dotted arc 4 4, that is, in its position shown indotted lines at 60d' in Fig. 4, its edge which bears on the cover 53 hasreached the left-hand end of. the cam surface 59 and bears thereon as itmoves forward, resulting in turning the vane on its post axis, againstthe reaction of the spring 53, till it in succession attains thedotted-line position at 50d, the solid-line position at Elib, thedottedline position at 50h', from whence it passes into the narrowestpart 52a of the chamber where the space between the housing and housingcover is little more than the thickness of the vane; thence out of thisnarrowest part between the diverging right-hand end of the cam surfaces58 and 59 where it successively attains the dotted-line position at 60',the solid-line position at 50, the dotted-line position at 50 and thenthe dottedline position at 60" where the key 6la is again f against thestop 61. While the vane is in the narrowest part 52a of the rotorchamber, the key Gla bears on the stop 611. To arrange for theoscillation of the Vane from and to its said transverse position thebeveled or rounded corners 60e and 60f are provided. The left-hand endof cam surfaces 58 and the right-hand end of cam surface 59, as shown inFig. 4, are disposed to provide room between the ends of the passingvanes and these surfaces in order that the vanes may not engagetherewith and also to allow for the passage of oil by the vanes whenthey are moving through these parts of. the chamber.

' Now assume that the rotor revolution be reversed and the vanes passbetween the cam surfaces 58 and 59 from the right toward the left hand.Then, as before, the reaction of the springs 63 will cause the vanes tobear on the right-hand end of cam surface 58 and, after leaving thenarrowest part of the chamber at 52a, they will bear on the left handend of the cam surface 59 while passing through the abovedescribed,illustrated positions.

The length of the narrowest sector 52a of the rotorY chamber is longenough to insure the .presence of a vane therein at all times and thusprevent oil from passing through it in a directio opposite to the vanemovement.

Thecontinuous closure of the sector 52a of the rotor chamber against thepassage of oil compels the oil to move downward from the port 54, andrevolve the vanes and disc in the direction of` the arrows in Fig. 3, topass out through the port 55. When the direction of oil movementisreversed and the oil enters through the port 55, the oil must movedownward in the rotor chamber,

moving the vanes and disc in a direction opposaid disc each having asegmental extensionadapted to limit the oscillations of. a key bossdisposed therein to ninetyV degrees, a rotor vane post mounted foroscillation in each of said post bearings, the said key boss on the saidpost, and

a rotor Vane fastened on the outer end of theV said post.

2. A hydraulic rotary motor including, a rotor housing, an annularrotor-vane chamber inthe said housing having inlet and outlet portscon#V bearings, rotor vanes fastened .on the outer ends of therotor-vane posts and disposed in the rotor-vane chamber to rotate on theaxis ofthe rotor disc through the chamber and to rotate in each of thesaid tapering portions of said chamber on the axes Vof. the rotor-vaneposts, the said vanes having a depth equal to the depth'of said chamber,a width equal to the width of the major portion of the chamber and athickness equal to the Width of the minor portion of said chamber, meansto limit the oscillations of said vanes on the rotor-vane post axesbetween positions of the vanes parallel with the rotor disc axis andpositions of the vanes at right angles Withgthe axis of the rotor-vanedisc, and a spring mounted on each of the rotor-vane posts fastened tothe post and to the rotor disc tending to restrain the rotation of. saidVane on the axis of the post from its position parallel with the axisofthe rotor disc, yielding to the camming action of the one taperingportion of the chamber to rotate the vane on the post axis from its saidposition parallel with the. axis of the rotor disc to its position atright angles With the axis of the rotor disc While the vane is rotatingon the axis of the rotor discl through said one tapering portion of thechamber and tending to cause said vane to rotate on. the said post axisto return to its initial position parallel with said rotor disc axiswhile rotating through said other tapering portion of the chamber on thesaid rotor disc axis.

VAN LAWRENCE BENDSIL.

LOUIS JOSEPH ST. JOHN.

